Parking windshield cleaner



Oct. 8, 1929. D Q scHlLLlNG 1,730,827

PARKING WINDSHIELD CLEANER Filed March ll 1927 bm/J c. Milf Patented Oct. 8, 1929 UNITED STATES .PATENT OFFICE y DONALD C. SCHILLING, OF CLEVELAND, OHIO, ASSIGNOR TO-TRICO PRODUCTS COR- PORATIQN, OF BUFFALO, NEW YORK PARKINQ WINDSHIELD CLEANER Application filed March 1, 1927. Serial No. 171,866.

This invention relates primarily to a parking windshield cleaner which is so constructed and designed as to effect a parking or positioning of the wiper element to one side of the range of vision when the cleaner motor is shut off. Automatic Windshield cleaners have heretofore been devised wherein a parking of the cleaner has been effected by directing the source of suction or operating pressure to one side of the motor piston for drawing or moving the piston toward the adjacent end of the piston chamber. Such parking cleaners have diverted the source of suction or operating pressure about the automatic valve mechanism of the motor.

The present invention has for its objects to direct the parking pressure or suction through the regular automatic valve mechanism of the motor; to provide means for positively moving and holding the automatic Valve mechanism in one of its two operative positions whereby the operating source will be continuously directed to one. side of the piston to bring such positive parking actuation of the automatic valve mechanism under and common to the manual control valve of the motor.

In the drawings,

Fig. 1 is a transverse sectional vievs7 through the improved-windshield cleaner as applied'to a section of a windshield,

Fig. 2 is an elevation, partly in section, further disclosing the parking feature of the windshield cleaner, portions being removed,

Fig. 3 is a horizontal and fragmentary sectional view about on line 3--3 of Fig. 2,

Fig. 4 is a detailed plan view of the parking lever with the actuator omitted,

F ig.5 is a detailed sectional view on line 55"of Fig. 1 showing the cooperation between the parking lever and its actuator.

The motor,-inl this particular construction comprises a cylinder formed of two cupped sections 1 clamped together at their open ends by an encircling band 2, the ends of which are secured to a cover plate or body member 3. The body member is provided on its inner face with a bearing sleeve 4, and beneath this sleeve saidface is provided with spaced cylinder ports 5 and an interposed suction port 6, said suction port being alternately connectable to the cylinder ports for establishing communication with the respective ends of the cylinder as by means of `pipes 7 which are connected to the ports 5.

Journal-ed within the bearing sleeve 4 is a.

wiper actuating shaft 8 which extends transversely through the cylinder or casing-of the motor and supports a wiper 9 on its outer end. This shaft has fixed thereto within the cylinder a segmental gear 10 which meshes with a rack 11 connecting the spaced piston elements 12, whereby as the latter are reciprocated within the cylinder, such motion will be translated into the desired oscillatory motion for operating the wiper. The valve actuating mechanism comprises a valve carrier 13 and a slide or actuator 14, together with an interposed connecting spring 15. In the form shown the valve carrier is of an open frame construction, having a central opening 16 by which the carrier may be passed over the projecting bearing sleeve 4 and hung or suspended on a knife or bearing edge 17. This bearing vedge is formed on the upper side of the bearing sleeve at an inclination extending down- ,wardly toward the inner face of the body member 3 whereby the carrier frame will be urged toward the valve' seat. The lower side of the valve carrier frame is provided with an opening adapted to receive the stem or shank of the val've 1S, a stop por- .tion 19- depends from the carrier fram-e to cooperate with spaced stops 20 on the body member 3 to define the extent of movement of said frame, said stop portion having an outwardly upturned terminaly to which one end of t-he spring 15 is attached.

On the under side of the bearing sleeve 4 is a guide in the form of a groove 21, and in this groove is mounted the actuator 14, to which the upper end of the spring 15 is connected.

In the operation of the valve mechanism, the actuator is shifted by and during the movement of the piston assembly 12, the rear piston engaging the adjacent end of the actuator as it nears the completion of its stroke and shifting the actuator to move its attached end of the spring. under compression, to the o`ther side of the vertical plane which includes the lower terminal or, in other words, beyond dead center. At this point in the operation, the spring expands and shifts the valve carrier againstthe opposite stop 20, in which position the valve connects the suction port to the uncovered cylinder port 5 whereby the air behind the piston will begin to be withdrawn while atmospheric pressure will be admitted through the formerly closed and now uncovered or open port 5 to its respective zone in the cylinder. In this connection atmospheric pressure always obtains within the cylinder between the two piston elements by reason of the air leak joints between cup members 1, the band 2, the body member 3 and the bearing for the shaft 8.

The valve actuating mechanism just described constitutes the subject matter of the co-pending application of Frederick G.\Fol berth and William M. Folberth, filed July 3, 1926, Serial No. 120,378, and is shown merely for the purposes of illustration, the present invention which relates to the parking of the Wiper, being applicable to other types of valve snap mechanisms wherein a valve is shifted or moved back and forth between two operative positions.

In accordance with the present invention, the body member 3 is provided `with a depending extension 22 in which 1s threaded the motor throttling valve 23 which has its inner end shaped to reduce the supply of suction through the pressure supply port 6, the term pressure supply port being used broadly to include either super or sub atmospheric pressure. The inner end of the throttle valve 23 does not completely close the line of communication between the source of suction and the port 6, but is designed merely to. throttle the speed of the motor whereby the operation of the wiper member is varied at will. In the extension 22 is formed a recess or chamber 24 substantially concentric with the valve 23, the chamber or depression having a tubular central boss 25 through which the valve stem extends` The chamber 24 has communication with the interior of the motor housing or piston chamber by means of a slot 26, and in this slot operates a lever 27 which is designed to be moved into engagement with the stop portion 19 of the valve mechanism and shift the cam lock 29 which normally is urged to lie in proximity to said tubular boss by means of a concealed spring 30, one end of which bears on the surrounding wall 31 of the chamber 24 and the opposite terminal of which is engaged behind the cam lock 29. In the normal position of the parking lever, to which the concealed spring 30 yieldably holds the same, the Work arm extremity 32 of said lever is disposed behind one of the stops 20 so as not to interfere with the normal operation of the valve mechanism. To park the Wiper to one side of the line of vision of the operator of a motor vehicle, it is necessary to have means for swinging the lever about its fulcrum and thereby cause the extremity 32 of the parking lever to engage and move the stop portion 19 of the valve carrier 13 over against the opposing stop 20, in which position the source of operating pressure will be continuously connected to one end ofthe piston chamber. The means in the present instance which is employed to move the lever 27 is connected to the throttling valve 23 so that the control of the wiper during its normal operation, and the parking of the wiper will be in common. In carrying this idea into effect the knurled operating handle 33 of the throttling valve 23 is provided with a sleeve 34 which concentrically hangs about the valve stem and has its lower or free peripheral edge beveled to provide a cam surface 25 for engaging and riding clown the cam lug 29 to effect a lateral shifting of the lever 27. The sleeve 34 is spaced from the throttling valve stem to receive the tubular boss 25 therebetween and a concealed spring 36 is disposed within this space and bears on the tubular boss 25 to provide frictional holding for the throttling valve. Obviously upon screwing the throttling valve home the beveled or cam edge 35 of the sleeve 34 will engage the cam lug 29 and shift the parking lever 27 to the left, in Figs. 2 and 4, and should the stop portion 19 be spaced from the left hand stop 2O the active portion or extension 32 of the parking lever will engage and move said stop portion against the left hand stop and there hold it. In this parked position the suction port 6 will be continuously in communication with the left hand chamber yport 5 so that the left hand piston compartment will be in constant communication withthe source of suction and the wiper will be correspondingly parked to one side of the field of vision through the Windshield. The sleeve 34 therefore serves as an actuator for the parking lever 27, which actuator is under a common control with the throttling valve 23. By reason of the resilient connection 15 between the valve carrier and the valve actuator, the valve carrier may be shifted by the parking lever without opposition and without injury to any of the parts of the valve snap action. The parking lever chamber 24 is closed bya cover plate 37 which is secured in position by the pivot screw 28, said cover plate having a central opening through which the parking actuator 34 may readily pass.

The vterm operating pressure is used to indicate that pressure which is confined Within the fluid supply pipe and which in the present instance 1s sub-atmospheric pressure or suction. v

- I claim:

l. A .parking Windshield cleaner comprising a wiper, a fluid pressure motor embodying a piston chamber, a piston reciprocable therein and operatively connected to the wiper for moving the latter back and forth, valve mechanism operable by a moving part of the motor for operatively admitting fluid pressure to the chamber, means for arresting the operation of said automatic valve mechanism and moving a part thereof to a predetermined position for correspondingly directing the operating suction into the chamber for moving the piston to one end thereof7 a control valve, and a single means for throttling said control valve and concurrently rendering the first means operative.

2. An automatic windshield cleaner comprising a piston chamber, a piston operable therein, `a wiper operable by the piston, a valve seat having a pressure supply port and spaced chamber ports the latter communicating with the chamberat opposite sides'of the piston, a valve having two operative positions one wherein the valve connects the supply port t-o one of the chamber ports and the other wherein the valve connects the supply port to the other of the chamber portsJ valve mechanism for shifting the valve back and forth from one operative position to its other operative position by and during movement of the piston whereby operating pressure s-alternately applied to opposite sides of the piston, said valve mechanism comprising a carrier part and an actuator part resiliently connected to the carrier part. means for moving one of said parts of the valve mechanism to positively secure the valve in one of its operative positions, a control valve for controlling the supply of pressure to said supply port, and a single member acting to move the control valve to a throttling position and, by and during said throttling movement, to render said means operative to effect a parking of the wiper.

3. An automatic windshield cleaner comprising a piston chamber, a piston operable supply port to the other of the chamber' ports,

valve mechanism for shifting the valve back and forth from one operative position to its other operative position by and during movement of the piston whereby operating pressure is alternately applied to opposite sides of the piston, a parking lever designed for\ engaging the valve mechanism to shift the valve to a predetermined one of its operative positions and secure it thereat, and a common control for said supply port and for operating the lever.

4. An automatic windshield cleaner comprising a piston chamber, a piston operable therein, a wiper operable by the piston a valve seat having a pressure supply port and spaced chamber ports the latter communicating with the chamber at opposite sides of the piston, a valve having two operative positions, one wherein the valve connects the supply port to one of the chamber ports and the other wherein the valve connects the supply port to the v other of the chamber ports, valve mechanism for shifting the valve back and forth from one operative position to its other operative position bv and during movement of the piston whereby operating pressure is alternately applied to opposite. sides of the piston, a parking lever designed for engaging the valve mechanism to shift the valve to a predetermined one of its operative positions and secure it thereat, means for operating the lever, means for controlling the communication between the pressure supply port and a source of operating pressure, and a common control for said two means.

5. An automatic windshield cleaner comprising a piston chamber, a piston operable therein, a wiper operable by the piston, a valve seat having a pressure supply port and spaced chamber ports the latter communieating with the chamber at opposite sides of the piston, a valve having two operative positions, one wherein the valve connects the supply port to one of the chamber ports and the other wherein the valve connects the supply port to the other of the chamber ports, valve mechanism for shifting the valve back and forth from one operative position to its other operative position by and during movement of the piston whereby operating pressure is alternately applied to opposite sides of the piston, a valve for throttling the pressure supply port to control the speed of the piston, and means operable by a continuation of the throttling movement of the throttle valve for positively securing said first valve in one of its operative positions.

6. An automatic windshield cleaner comprising a piston chamber, a piston operable therein, a wiper operable by the piston, a valve seat having a pressure supply port and spaced chamber ports, the latter communicating with the chamber at opposite sides of the piston, a valve having two operative positions one wherein the valve connects the supply port to one of the chamber ports and the other wherein the valve connects the supply port to the other ot' the chamber ports, valve mechanism for shifting the valve back and forth from one operative position to its other operative position by and during movement of the piston whereby operating pressure is alternately applied to opposite sides of the piston, a throttling valve for the pressure supply port having a part acting to open and close said supply port, a lever pivoted for movement to a position for securing the first valve in one of its operative positions, and means operable by and during a continued movement of the throttle valve for moving said lever to its operative position.

7. A windshield cleaner comprising a casing having a piston chamber, a. piston operable therein, a wiper operable by the piston, said casing having a valve seat with spaced chamber ports comm'unicating with the chamber lon opposite sides of the piston and an interposed suction port, a valve movable to alternately connect the suction portto the chamber ports, valve mechanism operable by and during movement of the piston for oper- I ating the valve, a throttling valve threaded into the casing for throttling the suction port, said casing having a lever chamber about the throttling valve communicating with the space occupied by said valve mechanism, a lever pivoted in the lever chamber and movable to engage and hold the valve mechanism against operation and in a position wherein the iii-st valve connects a predetermined one of the chamber parts to said suction port, and an actuator sleeve connected to the throttling valve and having a cam part for camming against the lever to move the latter to its operative position.

v8. A windshield cleaner comprising a casing having a piston chamber, apiston operable therein. a wiper operable by the piston, said casing having a valve seat with spaced chamber ports communicating with the chamber on ppposite sides of the piston and an interposed suction port, a valve movable to alternately connect the suction port to the chamber ports, valve mechanism operable by and during movement of the piston for operating the valve, a throttling valve threaded into the casing for throttling the suction port, said throttle valve having a depending sleeve constituting a lever actuator, and a parking lever pivoted on the casing and movable into engagement with the valve mechanism for holding the valve in one of its operative positions, said lever being operable by said actuator sleeve.

9. A Windshield cleaner comprising a casing having a piston chamber, a piston operable therein, a wiper movable by said piston, said casing having a valve seat with spaced chamber ports communicating with the chamber on opposite sides ofthe piston and an interposed suction port, a valve movable to connect the suction port to each chamber port alternately, a carrier part movably mounted for carrying the valve back and forth from one to the other of two positions, an actuator movable by and during movement of the piston for shifting the valve carrier part, a throttling valve for controlling the suction through the said suction port whereby the movement of the piston may be retarded and accelerated at will, and ay parking device positively actuated by and during movement of the throttling valve and engageable with said valve carrier part for moving the latter to and holding it in one of its operative positions whereby the suction will be continuously applied to the chamber at one side of said piston.

l0. A windshield cleaner comprising a casing having a piston chamber, a piston operable therein, a wiper movable by said piston, said casing having a valve seat with spaced chamber ports communicating With the chamber on opposite sides of the piston and an interposed suction port, a valve movable to connect the suction port to each chamber port alternately, a carrier part movably mounted for carrying the valve back and forth from one to the other of two positions, an actuator movable by and during movement of the piston for shifting the valve carrier part, a throttling valve for controlling the suction through the said suction port whereby the movement of the piston may be retarded and accelerated at will, a parking member normally disposed out of the path of movement of said valve carrier part and movable into said path for engaging said valve carrier part, and holding it arrested in one of two operative positions, and a cam movable by said throttling valve into camming engagement with said parking member for moving the latter into the path of said valve carrier part.

1l. A windshield cleaner comprising a casing having a piston chamber, a piston operable therein, a wiper movable by said piston, said casing having a valve seat with spaced chamber ports communicating with the chamber on opposite sides of the piston and an interposed suction port, a valve movable to connect the suction port to each chamber port alternately, a carrier part movably mounted for carrying the valve back and forth from one to the other of two positions, an actuator movable by and during movement of the pisrier part.

DONALD C. SCHILLING.

CERTIFICATE OF CORRECTION.

Patent No. 1,730,827 Granted October 8,- 1929, to

DONALD C. SCHILLING.

It ishereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, line 106, for the numeral "25" read "35"; page 3, line 25, claim I, before the word "valve" insert the word "automatic"; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 12th day of` November, A; D. 1929.

bioere,

(Seal) Acting Commissioner of Patents, 

